Does the fact that it's asking for key points make it not-too-broad?
No, the problem is that without setting any context at all in the question, there are no general key points. Absolutely any feature of a society can be an important top-level variable, and need to be in the key points list of a world where it could vary. That's because as Worldbuilders, we get to decide what the important drivers for society are, and we need to follow through with those consequences.
For example, on a world where there were four sentient races based around the classical elements of Fire, Earth, Air and Water, a key point for each culture within it would be which elements were represented.
However, I have asked a very similar question, and got good responses. I think that is because I scoped my question to be about describing a fantasy RPG world. If the question we are discussing here could set a less general top-level scope (e.g. science-fiction describing the culture on each planet), then I thinkit would be easier to make a start on an answer.